Tire valve



Feb. 12 1924. 1,483,374

F. v. PEPPER T IRE VALVE Filed March 7. 1922 p NVENTOR. 4AM @Wwv BYATTORNEY Fatented Feb. 212, 3.9124.

FREDERIGK l7. @EPPER, @F LOS ANGELES, CALIFGRNIA.

TIBE VALVE.

Application tiled Harsh 7, 1922. Serial Nb. M13553.

\ iication.

My invention relates to a valve for the inner tube of a pneumatic tire,and the object thereof is to provide means to quickly attach or detachthe valve stem from the felloe of the wheel. A further object is toprovide a valve that will prevent the air from leaking out of the tube.

My invention is illustrated in the accompanying drawing, forming aPartof this application which is an enlarged-view, partly in elevationand partly in longitudinal central section of my tire valve.

Referring to the drawings, 1 is a fragment of the inner tube of apneumatic tire, to which the stem 2 of my tire valve is secured in theusual manner. The felloe 3 is shown in dotted lines and contacts withthe rim 4. Stem 2 has a longitudinal central channel 5 therein, theinner end of which opens intothe inner tube, and the onterend-opens intothe valve chamber 6. The outerend of the valve chamber is enlarged andthe inner surface of the outer portions of the walls of the stem arethreaded as shown at 7. The side walls of the valve chamber are parallelexcept at the point of juncture of the larger and smaller portions ofthe chamber, which occurs at near the-center thereof. At this point thewalls slant and form a seat 8 for a pierced plug 9 which is preferablyof rubber. The outer end of plug 9 preferably tapers outwardly. Atubular expander 10 screws into the outer end of stem 2, andpreferablyhas the inner end tapered to fit into the outer end of plug 9, wherebythe outer end of the plug may be expanded, and thereby make an air tightcontact with the walls of the stem. The outer end of expander 10 has akerf for the reception of a suitable tool to properly position theexpander. Projecting through plug 9 and expander 10 13 a stem 12, onthe'inner end of which is a valve 13 which is normally positioned toengage the inner end of plug 9, and prevent air passing therethrou h. lear the outer end of stem 12 is a co lar 14. A spring 15 is coiledaround stem 12 between collar 1 and shoulder 10 oi expander 10, andnormally holds valve 13 seated on the inner end of plug 9.

The outer surface of the outer end of stem 2 is exteriorly threaded forthe reception of the safety cap 16, which screws thereon to hold the airfrom escaping if valve 13 or plug 9 should become defective and let theair leak past. 5 list below the safety cap the opposite sides of steri fJ are flattened at 17 to hold a tool to prevent the stem from turninwhen expander 10 is positioned. To ho d stern 2 firmly positioned in thefellce 18 shown. in dotted lines, I use a slip nut having a knurled head19 and a slender slitted body 20, the exterior surface of which istapered and threaded. A binding but 21 screws upon the body and holds itin frictional engagement with stem 2, thereby holding the stem firmlypositioned. A dust cap 22 is screwed upon the outer end of body and actsas a lock nut for nut 21. By this construction it will be seen that w onit is necessary to change tires by loosening the dust cap and thebinding nut, the slip nut can be removed from stemQ, thereby permittingthe tire to be removed. It will be seen that if desired valve 13 andconnected parts can be removed by unscrewingt the expander, and newparts quickly pu in.

Having described my invention, 1 claim:

1. The combination of a tire valve having a stem; with a slip nut havinga slitted body whose exterior is tapered and threaded and is adapted tohe slid upon said stem; a binding nut ada ted to screw upon said bodyand cause, said ody to frictionally en age the stem, said slip nutengaging the fel oe when positioned for use and a dust cap havinginterior threads adapted to screw upon said body and act as a nut lockto said binding nut.

2. In a tire valve means to secure the stem thereof in a tellcecomprising a sli nut having a slitted body whose exterior is tapered andthreaded and a binding nut adapted to screw upon said. bodyand cause InWitness that Ielaim the foregoing, I said body to frietionally engagethe stem, have hereunto subscribed my name this 25th said slip nutengaging the felloe when poday of Feby, 1922.

sitioned for use, and projecting through the FREDERICK V. PEPPER.binding nut, said projecting part being Witnesses: adapted to receiveand hold a dust esp CHARLES W. CODY,

. adapted to act as a, nut lock, Wm. B. Lam

